"""ORM tables owned by Agent 3 (delivery & infra).

Use ``from app.core.database import Base`` and the helpers in
``app.infrastructure.db.columns`` (``pk()``, ``created()``). Do NOT import from
``app.infrastructure.db.models`` here: that module imports this one (import cycle).
Foreign keys to existing tables are written as plain strings, e.g.
``ForeignKey("organizations.id", ondelete="CASCADE")``. See docs/plan/PLAN-v2.md §6.
"""

from __future__ import annotations